/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/

//  Software Guide : BeginCommandLineArgs
//  INPUTS:  {brainweb165a10f17.mha}
//  ARGUMENTS: {WhiteMatterSegmentation.mhd}
//  Software Guide : EndCommandLineArgs


#include "itkConfidenceConnectedImageFilter.h"
#include "itkCastImageFilter.h"
#include "itkCurvatureFlowImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"

// Software Guide : BeginLatex
//
// This example is a 3D version of the previous ConfidenceConnected example.
// In this particular case, we are extracting the white matter from an input
// Brain MRI dataset.
//
// Software Guide : EndLatex


int main( int argc, char *argv[] )
{
  if( argc < 3 )
    {
    std::cerr << "Missing Parameters " << std::endl;
    std::cerr << "Usage: " << argv[0];
    std::cerr << " inputImage  outputImage " << std::endl;
    return EXIT_FAILURE;
    }


  using InternalPixelType = float;
  constexpr unsigned int Dimension = 3;
  using InternalImageType = itk::Image< InternalPixelType, Dimension >;

  using OutputPixelType = unsigned char;
  using OutputImageType = itk::Image< OutputPixelType, Dimension >;

  using CastingFilterType =
      itk::CastImageFilter< InternalImageType, OutputImageType >;
  CastingFilterType::Pointer caster = CastingFilterType::New();


  using ReaderType = itk::ImageFileReader< InternalImageType >;
  using WriterType = itk::ImageFileWriter<  OutputImageType  >;

  ReaderType::Pointer reader = ReaderType::New();
  WriterType::Pointer writer = WriterType::New();

  reader->SetFileName( argv[1] );
  writer->SetFileName( argv[2] );

  using CurvatureFlowImageFilterType =
      itk::CurvatureFlowImageFilter< InternalImageType, InternalImageType >;
  CurvatureFlowImageFilterType::Pointer smoothing =
                         CurvatureFlowImageFilterType::New();

  using ConnectedFilterType =
      itk::ConfidenceConnectedImageFilter<InternalImageType, InternalImageType>;
  ConnectedFilterType::Pointer confidenceConnected = ConnectedFilterType::New();

  smoothing->SetInput( reader->GetOutput() );
  confidenceConnected->SetInput( smoothing->GetOutput() );
  caster->SetInput( confidenceConnected->GetOutput() );
  writer->SetInput( caster->GetOutput() );

  smoothing->SetNumberOfIterations( 2 );
  smoothing->SetTimeStep( 0.05 );

  confidenceConnected->SetMultiplier( 2.5 );
  confidenceConnected->SetNumberOfIterations( 5 );
  confidenceConnected->SetInitialNeighborhoodRadius( 2 );
  confidenceConnected->SetReplaceValue( 255 );

  InternalImageType::IndexType index1;
  index1[0] = 118;
  index1[1] = 133;
  index1[2] = 92;
  confidenceConnected->AddSeed( index1 );

  InternalImageType::IndexType index2;
  index2[0] = 63;
  index2[1] = 135;
  index2[2] = 94;
  confidenceConnected->AddSeed( index2 );

  InternalImageType::IndexType index3;
  index3[0] = 63;
  index3[1] = 157;
  index3[2] = 90;
  confidenceConnected->AddSeed( index3 );

  InternalImageType::IndexType index4;
  index4[0] = 111;
  index4[1] = 150;
  index4[2] = 90;
  confidenceConnected->AddSeed( index4 );

  InternalImageType::IndexType index5;
  index5[0] = 111;
  index5[1] = 50;
  index5[2] = 88;
  confidenceConnected->AddSeed( index5 );

  try
    {
    writer->Update();
    }
  catch( itk::ExceptionObject & excep )
    {
    std::cerr << "Exception caught !" << std::endl;
    std::cerr << excep << std::endl;
    return EXIT_FAILURE;
    }


  return EXIT_SUCCESS;
}
